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My Technology Template

Investigation Criteria

A

Problem

The problem we have is

that PYP students need to learn

about simple cams.

How can we make

our presentation clear

so that the PYP student learn clearly.

Students also need to know about CAD/CAM

Guiding Questions

How can we use CAD/CAM to

provide a more interesting experience?

How can we make this a fun and interactive experience?

How can we help PYP students learn about cams, levers linkages and pendulums?

AOI

Cams have been used by humans and we are using them everyday.

Human Ingenuity

Design Brief

I am going to solve this problem by conducting the following

The research I will do is search the internet to find information about CAD/CAM and cams

The creation I intend to make is a PowerPoint presentation or movie to teach them about CAD/CAM and to guide them to make a cams model

This will help the ISM community because it prepare PYP students for MYP

Primary Research

I asked the following questions

1 What are cams?

2 What is Cad/Cam?

3 Where are cams used in daily bases?

4 What wouldn't we have if we didn't have cams

5 How can we make cams or an example of a cam?

6 What types are there?

7 Why are cams useful?

8 How does CAD/CAM work

9 What website can use?

10 How can we teach people about

Secondary Research

http://imaginationfactory.questacon.edu.au/cams.html

Circular cams, also known as eccentric cams, are circle-shaped and fitted off-center onto the driving shaft. These cams move very smoothly and are used to generate a wave-like motion in the follower. They are often used in mechanical toys to produce a smooth, recurring motion.

Pear-shaped cams are actually egg shaped. The follower is level for most of the cam’s rotation, then is suddenly pushed up at regular intervals. These are used in car engines to control the flow of air/fuel and exhaust in the engine.

Heart-shaped cams allow the follower to move at a constant velocity and therefore provide a very steady motion. They are used in sewing machines to wind thread onto the bobbin.

Drop-cams are shaped like a snail shell. These cams lift the follower gradually, then drop it suddenly.

The crank and slider is a special type of cam that you can find on the wheels of steam engines. It consists of a piston (the slider) that is attached to a circular cam (the crank) by a rod. The rod is offset from the cam’s axle. As the piston moves back and forth, it pushes and pulls on the rod, which turns the cam around. In a steam engine, the wheel is the cam! (this has been copied to help me learn)

http://www.robives.com/mechanisms/cams

A cam converts rotary movements in to reciprocating movement. As the cam turns, driven by the circular movement, the cam follower traces the surface of the cam transmitting its motion to the required mechanism.

Cam follower design is important in the way the profile of the cam is followed. A fine pointed follower will more accurately trace the outline of the cam. This more accurate movement is at the expense of the strength of the cam follower.

As the cam turns it has a tendency to push the cam follower to one side. To overcome this a separate cam follower and push rod can be used as in this mechanism. Here the cam follower drags over the cam surface, accurately tracing the surface of the cam. Any movement of the cam follower is transferred directly to the push rod (this has been copied to help me learn)

This information will be helpful because it will teach me and the PYP students about cams

These pictures will help me by

Creating the model cams

Criterion B

Design

Design 1

We will use the changeable cam model and put a motor on it. We will also put a cow on the top nodding it’s head to show the movement of different cams. We will take two models and combine them. We will get the design from robives then import it robo master then covert it to an outline. The the machine will cut the design. We will use card, glue. We might add a motor to our model.

These are the two models. We are going to use

The cow

The interchangeable cam

Design 2

Making a short a short movie to show what are cams and Cad/Cams and how they work and make a model to show one. We will make the movie on movie maker. We will use a video camera to film how a cam works

The design shows different movements of the cams can make and it fun to make, look at and to learn about them.

Making a video, PowerPoint, Prezi or a poster to show how the craft Robo works. This will be easier and more clear to the primary.

Final design

We liked to first design because it will be easier and better way to explain to the P5/6 how Cams work.

Criteria C

Plan

These charts are connected

This will help me to be more organize with my work

Criteria D

Create

Creation Evidence

These are some photos to show us making the model

I found out that……..

They a re different types of shapes that rotates and it pushes a rod up.

CAD/Cam stands for Computer aided design/Computer aided Manufacturing

Cams are used in engines and other places.

We would have no car engines because in a engine cams are used.

You can used a Robives it allows you to make the Robo cutter to make models

Cams are can be all different types of shapes and sizes.

You can make projects using robives.com to make different types of design

You can make a presentation, poster or teach them using your voice.

Evaluation

I have learnt a little about cam and other mechanisms.

By: Mohammed Madan M3

Testing of designs against specification

To make sure my designs and final creation have worked I will make a questionnaire based on my specification

  • Were the lessons fun?
  • Have you learned a lot?
  • Would you be able to do a project on it now?
  • Can you set up the robo cutter now?
  • Do you know how to operate robo master and cutter?
  • Can you mention were cams are used?

Design 3

Design Specification

from my research i have decided that my design must have some essential features

  • A model of a working cam.
  • An explanation about cams.
  • An explanation about cad/cam.
  • To show how cad/cam works.
  • An explanation how robo cutter works.
  • It would be desirable for my design to have the following features
  • Change able cams.
  • Many pictures and diagrams of cams.
  • A fun and attractive lesson.
  • A game to teach them about cams and cad/cam.
  • Some thing that is not too hard for them.
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